Wireless High-Water SensorThe Wireless High-Water Sensor detects if there is water in the bilge and instantly sends an alert to the Siren Marine App if water has risen above a preset level. Mount the Water Probe at the desired height in the bilge and plug the other end into the Wireless Module. Link the module to the MTC and receive alerts if the boat is taking on water.Includes: Wireless Sensor Module Water Probe 3 feet of wire